Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Year ended December 31, (in thousands)	201 6		2015
Current	$	--	$	3
Total	$	--	$	3

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Year ended December 31,	201 6			201 5
Statutory rate		35	%		35	%
Change in valuation allowance		(35%	)		(35%	)
Effective rate		0	%		0	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

(in thousands)	201 6			201 5
Deferred tax assets:
Federal, state and foreign loss carryforwards	$	1,440		$	1,850
Deferred revenue		30			68
Federal and state tax credits		642			653
Other		823			(79	)
Total deferred tax asset		2,935			2,492
Less valuation allowance		(2,935	)		(2,492	)
Net deferred tax asset	$	--		$	--

Summary of Operating Loss Carryforwards [Table Text Block]

(in thousands)	201 6		201 5
2021	$	689	$	689
2022		849		849
2030		--		4
2031		--		298
Thereafter		2,578		3,445
Total	$	4,116	$	5,285